Radio device and electronic apparatus

Abstract

The invention provides a radio device in which multi-resonance promotion and impedance adjustment can be readily performed and a restriction in a mounting space can be dissolved, and an electronic apparatus having the same installed therein. Provision of a stub (123) having a large area and serving as a frequency matching portion as well in a folded monopole antenna (120) results in that a conductor area can be increased, and a resonance frequency can be shifted to lower frequencies. In addition, a frequency of a radio communication antenna can be readily adjusted because the resonance frequency is adjusted by cutting the stub (123).

Description

[0001] The present application is based on Japanese patent application No. 2005-335003, the entire contents of which are incorporated herein by reference.BACKGROUND

[0002] 1. Field

[0003] One embodiment of the invention relates to a radio device and an electronic apparatus having the same installed therein, and more particularly to a radio device having multi-resonance type antennas, and an electronic apparatus having the same installed therein.

[0004] 2. Description of the Related Art

[0005] In recent years, various terminals having respective radio devices installed therein have come into wide use. Radio communication antennas installed in these terminals, respectively, are proceeding from whip type antennas which have been widely adopted to built-in antennas. Use of the built-in antenna offers such advantages that the built-in antenna is more readily handled in use and accommodation than the whip type antenna is handled, and the degree of freedom for a chassis design increases, and so for...

Images